What is the most common size for an ophthalmic ointment tube?

The most common size for an ophthalmic ointment tube is 3.5 g. This standard size is typically used because it allows for adequate dosing and application for both therapeutic and lubricating purposes in the eye. Ophthalmic ointments are often applied in small amounts, and the 3.5 g size provides enough product for multiple applications while remaining compact and easy to handle.

In the context of ophthalmic care, this size balances practicality and efficacy, ensuring patients receive sufficient medication over the course of their treatment without the product becoming unmanageable or excessively bulky. The other sizes, such as 1.0 g and 1.5 g, reflect less common formulations that may not provide enough quantity for long-term use, while 3.0 g, although used, is still less prevalent compared to the 3.5 g tubes.